Casting pouring cup and casting method thereof

The invention provides a casting pouring cup and a casting method thereof. The casting pouring cup comprises a pouring cup body, a funnel-shaped pouring cavity is formed in the pouring cup body, an opening in the upper end of the pouring cavity is a circular opening, the bottom of the pouring cavity communicates with a direct pouring gate, and the direct pouring gate is arranged on one side of the axis of the circular opening in an offset mode; a filter screen structure is arranged on the side, away from the downsprue, of the pouring cavity; the pouring cup body comprises the following raw materials in percentage by weight: 26-30% of mullite, 17-22% of quartz sand, 6-11% of zircon sand powder and the balance of kaolin; according to the casting sprue cup filter screen structure, even if part of the casting sprue cup filter screen structure is blocked by large-density impurities, normal flowing of molten metal can be effectively guaranteed, the molten metal can be prevented from scouring a cavity in the casting